5 Little Monkeys’ Mattress for Kids

At 5 Little Monkeys, we believe that healthy, sound sleep is critical for kids. Unfortunately, most kids mattresses on the market leave a lot to be desired. That's why we’ve created the 5 Little Monkeys Sleep System: a revolutionary children’s mattress that uses specialized technology and organic materials to create a bed designed for kids from the ground up. Learn more about our kids mattress, or if you have questions about our kids mattress, take a look at some of our FAQs below.
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  • Product
  • Shipping & Returns
  • Health & Safety


What type of foundation or support is required for your children's mattress?

We recommend using the 5 Little Monkeys Platform Foundation to support the mattress. However, our kids mattress is compatible with most solid surface or slatted platform beds, bunk beds, foundations, box springs, daybeds, and trundles. Our mattress can also be placed on the floor during the transition from crib to big kid bed.

Is there a weight limit on the bed and can it support parents and a child if needed?

It may be a mattress designed for kids, but there's no weight limit on our kids' sleep system bed – and we encourage parents to snuggle in bed with their little ones!

What is the children’s mattress made out of?

The 5 Little Monkeys Mattress is made from a unique blend of 3 types of foam: the Comfort Layer has temperature-regulating memory foam technology, the Support Layer is made with responsive memory foam to help support lighter-weight bodies, and the Base Layer strengthens the layers above for durability, comfort, and resilience.wer here.

Is the monkey included with the toddler mattress?

Well, we wanted to surprise you, but... Yes, it is! We hope you enjoy the monkey with each sleep system bed purchase.

What are the 5 Little Monkeys mattress dimensions?

Twin Size: 39" x 75" x 8"
Full Size: 54" x 75" x 8"
Queen Size: 60” x 80” x 8”

It's perfect for bunk beds, platform beds, daybeds and trundles.

What are the dimensions of the pillow?

The 5 Little Monkeys Pillow is the standard 20" x 26", which can be used with standard size pillow cases.

Can the toddler mattress be used on a bunk bed?

Absolutely! We specifically designed the height of our kids mattress to work well with bunk beds.

Will the children’s mattress fit in a trundle bed?

Yes! Our mattress fits quite nicely in trundle beds and is 100% sleepover friendly.

Where is the mattress made?

The 5 Little Monkeys kid mattress is proudly made in California.

How firm or soft is the mattress?

The 5 Little Monkeys mattress is considered Cushion Firm to support and comfort your child.

How long can I keep the kids mattress in the box?

5 Little Monkeys mattresses can stay in the box for up to 3 months before the structural integrity is affected.

What makes your mattress specifically designed for kids?

So many things! But here are a few specific features of our sleep system bed:

  • Kids have a tendency to sleep hot which can prevent good sleep. We have a proprietary temperature regulating technology in the foam that helps kids sleep at their ideal body temperature for restful sleep.
  • Kids have lighter weight bodies, so we designed our support layer to have responsive foam for proper support.
  • Kids make "mistakes" so we made sure the fabric used on our cover is stain and water resistant, plus the cover is removable and machine washable with a heavy duty zipper for easy clean up.
  • We only use safe materials including organic cotton in our textiles that are OEKO-TEX ® certified and CertiPUR-US (r) certified foam.

What ages is the 5 Little Monkeys’ Sleep System bed right for?

The 5 Little Monkeys children’s mattress is suitable for kids that are 3 to 18 Years old. However, don't be surprised if your high school graduate decides to take theirs off to college.

Is the mattress protector truly waterproof?

Yes, our mattress protector is guaranteed 100% waterproof and will protect against any accidents or spills that occur on the children’s mattress.

Is the kids mattress protector organic?

We're glad you asked! Not only is our protector made with organic jersey knit fabric, it's glue backing is non-toxic, and it arrives in environmentally friendly fabric packaging.

Is the toddler mattress protector washable?

Yes! It is 100% machine washable, and you can throw it in the dryer on low. It's also super easy to spot clean using a damp cloth.

Shipping & Returns

How long does it take for my mattress to arrive?

You can expect your order to arrive between 3-7 business days.

Can I request a delivery date?

Definitely! Please notate your desired receiving date in the "Order Notes" section before checkout. Please also email to coordinate with our customer service team and they will do their best to hit your desired date.

Do I pay for shipping?

Nope! 5 Little Monkeys offers FREE Shipping within the 48 contiguous states for all products. However, we do charge for freight to Hawaii, Alaska and Puerto Rico: $300 Mattress & Mattress + Bundle - $65 for Pillows – $40 for Mattress Protectors & Plushy Monkey - $295 for Platform Foundations.

How does the 100 Night Rest Test Work?

When we say you can try our childrens mattress 100% risk-free, we mean it! If for ANY reason you or your little one is not completely satisfied with any of our products during the first 100 days of using your kids mattress, you may return it for a full refund. Please email us and we will help arrange to have the products donated to a local charity in your area or we will arrange to have the products picked up at your home.

What is the Recycling Fee, and why do I have to pay it?

If you live in California, Connecticut or Rhode Island, state law requires retailers to collect a "recycling fee" on each mattress, box spring, foundation, and base sold. This fee is "per piece." Each state approves the fee amount, and it isn't set or controlled by the retailer in any way. The total fee you pay will depend on the state you live in and what elements of our kids sleep system you order. Unfortunately, we're just the messenger here – but we're confident that you'll love your new children's mattress so much it'll be well worth it!

How big is the mattress shipping box?

Our mattress box is 48" x 17" x 17". But don't worry, we manage to fit a complete children's mattress in that small box!

How heavy are the boxes?

The Sleep System is 49 lbs for the twin, 67 lbs for the full and 73 lbs for the queen. Our kids platform bed is 44 lbs for the twin, 65 lbs for the full and 71 lbs for the queen. Our shipping partners will bring it to your door, but you may want to find a friend to help you get it from your front door into your child's room.

Health & Safety

How do you ensure your mattress is Fire Retardant-compliant without chemicals?

Instead of using toxic chemicals, the foam in our kids mattress is wrapped in a specially-made tubular knitted fabric (often referred to as an FR sock) that is inherently flame retardant. Additionally, our fire barrier has been tested and certified by UL GreenGuard Gold ®, which tests for harmful substances in textiles. Essentially, we rely on the properties of the materials themselves, instead of harmful chemicals, to achieve fire retardancy. Because chemicals have no place in a child's bed!

Are your children’s mattress products hypoallergenic?

Yes, all of our products and children’s mattresses are hypoallergenic.

What certifications does the 5 Little Monkeys Sleep System have?

Plenty! All 3 layers of foam in our children's mattress are CertiPUR-US ® Certified, which means they're made without formaldehyde, heavy metals, ozone depleters, TCEP flame retardants, chlorofluorocarbons, and phthalates, and regulated by Consumer Product Safety Commission (CPSC). The fabric used in our kids mattress cover is certified according to Standard 100 by OEKO-TEX (r), which means it meets the human ecological requirements for products with direct contact to the skin as well as the US requirement regarding lead in children's articles. We strive to always choose the healthiest option in building our kids bedding, and we're proud to say our certifications show it.

For more details regarding all of our certifications, check out our Certifications page!

Does the kids mattress protector keep allergens out?

Yes! Our mattress protector is not only waterproof, it's designed to act as a barrier to dust, dust mites, pollen, and other allergens. This means your child won't have to worry about allergies as they sleep through the night on our organic kids mattress.

Is the 5 Little Monkeys mattress fire safe?

It sure is! The 5 Little Monkeys mattress meets Federal Flammability Standard 16 CFR 1632 and 16 CFR 1633.

Do you use organic materials?

We're glad you asked! Our mattress protectors are made with organic materials – in other words, all the parts of our kids sleep system that your child comes into contact with – are all made using organic cotton. Not only that, your whole sleep system arrives in environmentally friendly packaging.

I've heard many mattresses contain dangerous chemicals. Does yours?

Absolutely not. Our kids mattress is made with foam that meets CertiPUR-US (r) standards for content, emissions, durability, and performance, and is analyzed by independent, accredited testing laboratories. It is made without CFCs (ozone depleters), without PBDEs, TDCPP or TCEP (“Tris”) flame retardants, without Mercury, lead or heavy metals, without formaldehyde or phthalates (air pollutants) - all regulated by the CPSC.

Does your kids mattress have low VOC emissions?

Yes! Our children’s mattress has low VOC emissions with less than 0.5 ppm for indoor air quality, so you won't have to worry about your kids bedding hurting your child's air quality.

Will your toddler mattress smell or “off-gas” after opening?

5 Little Monkeys foams are exceptional quality and off gassing is typically non-existent. Occasionally, there could be a faint fresh foam smell that will dissipate quickly and is from the foams being vacuum packed. If you find there is the fresh foam smell when you first open your mattress, we recommend waiting anywhere from 2-24 hours before putting on your 5 Little Monkeys Mattress Protector and making up your bed.